Electric motor.



C. A. SHEA.

Y ELECRlC MOTOR. -APPLlc/rlon mno MM2-1.1915.

` 1,216,002. muted Feb. 13; 1917.

. INVEN TOI? Wl T/VE SSE S JQOMJW@ y ffl C. A. SHEA.

ELECTRIC MOTOR.

APPLrcATmu msn uAY 24. 19's.

1,21 6,902. Patented Feb. 13,1917.

2 SHEETS-SHEET 2.

/wlrrifssfs Mmm cmsrorm A. sm, or Bos'roN, mass icrrusn'rr ELEc'rnIc nro'ronh 1,216,002. Specification of Letters Tatent.

, ppucation ,usd kay 24, 19,15. Serial No. 3 'i ,l ,4 i. 'i

To all'wtorn it may concern:

Be it known that I, CHRISTOPHER A. SHEA,

a citizen of the United States, residing at charging the nagnet i, adrect Y. Boston, in the county o f Suffolk and State current when Lheflugrfis gon The .indiyidr 6b 'of Massachusetts, have invented new and ualsheets com oosingftheoinpoun trnptnr useful Improvements in Electric Motors, of M may be sec ured together Lanyy uitable which the followin is a specification. manner, preferablyby-means a, M invention re ates to electric motors, constructed an to bej capableofgsupporting andl its object is to provide a machine of this for rotation the armature ,of the Amac ine. `46? 10 type, for utilizing the lines of force of a A frame suit able for the` purposey is indif magnetic field to impart mechanical motion cated at F. In the particularjconstruction to an amature, adapted to be energized shown it comprises apair oflongend pieces, either by current from dry cells or storage 4, having bearings, fsnch as 54, for; the armm batteries or by a high voltage direct or alture shaftanyl side elements; for ,spacingthe "70 ternating current, and capable of developing end pieces 4 a t thefproperdistance apaijt .and high efliciency with low vcurrent consumpconnecting them while, at,;the i ,sain time tion. y f serving ytoftietogether*thesindi ITV- sheets This motor has developed 'in actual use a 2 ofthe comj)ound magnfe'thm4 thecon.- very high eiliciency, far beyond that of an struction sho Nn there are two longsleevss, 75 electric motor in -general use or Vwith whic 6, (Fig. 3) bored yand tappedsthroughout I am familiar.- l y their length andtworshort spacingapieces,

other features Of my lIlVeIltlOIl 110i) hllll- 7, Somewhat Similar i sljewees before referred to will be hereafter described selves, bored and tapped at: their outer-ends 1 and claimed and are illustrated in the acto receive suf table v fastening ,scifegfvs, such 'as 80 companying drawing, in which Figure 1 is 8, eorrespon ing to .screws 9tfo1securing ,tof an elevation of my invention illustratin its gether the S11 Aeve 6 and the endiapieceadjaadaptability to various sources and kin s of cent to them. At their inner ends theseillf electric energy, including alternating curing pieces 7 are extended ito form long screw rent. Fig. 2 is a central vertical section of rods, such as 10, threadedatgtheir extreme 85 the vsame machine. Fig. 3 is a horizontal inner ends i0 erlterthel lthreaded.bcn-es ,gi section of the same taken through the armathe sleeves Gand havingprefonably `smooth tureshaft. Fig. 4: is a diagrammatic View Shanks wher; theypassthrouglpthe;jgdivid; showing the various circuits in connection ual l'sminatons `2 .toaholds,thema-together; i

with my motor. u t All these in(lividuallaniinationsaitishonld 90 Similar characters deslgnate llke parts 1n bev noted, are Valik e,t thatis preferablyeinterf all the 'figures of the draWmg-- 'chan eable, md have registeringopeningsfat Referring first tothe vapparatus shown in suits, 1s poi lts, for p5 rtposssof-` connu-,cian Figs 1 i10 3 iIlClliiSi'Ve, the principal elements and attachlr ent to other` parts. Affi r of-my maohine'are' a compound permanent The individual lamnationse 1newprefers- 40 and electro magnetand a rotary element or ablyformed with, curvedpolarefaces, which armature preferably having a pluralityof preferably :oincidegwith opposite# arcs-,wf coils, an to which rotary motion is imthe samei1 aaginary` cirelei-@Eaclil'faceia parted ,by the electromagnetic reaction. I shown occupiesan arc of considerablyincre prefer fomploy\`.mgnt composed Oia than120, andthespacebetween these pong 10 plurality of thin sheets of steel,` thus lobfaces4 is int endedto;| begfsubstantellyclled taining with-such@ compoundqs'tructure as byl suite ble; rotarymarnraturelprcvided strong Ia `field as'jpossible; This magnetlnay withpluialitycoilstcwhicharmatilreretary V be ofthe typede'signat'ed by M formed of movement wull-befiinpartedrbyatheiactioiqf a multiplicity of thin SheetS-ofSteeI, each of the ma netcieldwhencurneit is'lconducted 105 -inclidd KWithin thlejarmatnre circuit inthe presentsinvent"on;nto'nectisrshownlatom Y manner' hereinafterfdescribedfand,.shownin Itis-intenceel toisubstnntiallysgluthepae im Fig. 4,.'wh`en it is desired toiitilize the magbetween the curved polar faces p and p of 110 net as an electromagnet,4 as for.example the permalent or electro magnet 'M and when a high voltage direct or alternating leave but a small air gap between said polar are so formed and combined faces and the adjacent surface of the armature. This armature is shown as of cylindrical type, being in this instance laminated and comprising a large number of disks or lamin 1 perlpherally notched longitudinally, as shown at 12, to receive the turns of the armature coils. In the particular construction illustrated the armature has a multiplicity of coils, which are Wound into the notches 12, and the ends of these coils are brought out and connected to segments 'f a suitable'commutator, such as C, in a manner' analogous to that employed in dynamo-electric machines. A pa1r of brushes, such as b and b', coperate with the segments ofl the commutato'r in the construction illustrated and are connected to insulated binding posts 13 and 13 in any suitable manner. The permanent, or electro magnet and the armature, as will be obvious 4by reference to these views, as to produce an unusually high eiciency, the air gap being small andthere being a relatively large numbe'r`of conductors cutting the lines of force of theield at any given moment, and the intensity A of the -field being substantially the maximum attainable in a machine of this type and for a given size, while the amount of current required toenergize the armature coils, as they come into action one after another, is low.

Of course it will be understood that the rotation of the armature shaft, indicated' at 15, may betransmitted to any suitable part or apparatus to be driven, and'that the coils of the armature and fields may be venergized from any source of electric current by' the various methods now to be described in detail. v

In Fig. 4, 22V indicates a source of high voltage alternating current. The connections between lthis alternating current source and my improved machine are shown as such that when switch 23 is closed, thel current will traverse th followingpath: from the generator 22 through onductor 24, 'switch 23, and lamp 23'1 which acts as a resistance,

A conductor 25, terminal 13, coil c, coil c', terminal 13", conductor 21, brush terminal 13,

'of the current flow Vthrough the brush b', the commutator andthe armature coils, brush b brush terminal 13 and conductor 26 baci: to the source 22, and in the reverse direction through the same-circuit back to the source 22. Of course both of the coils c and c will in this instance be energized by the ,alternating current flowing through the path just described. Owing to thefact thatvthe polarity 'of the opposite poles of the electro magnet is determined and controlled by the direction of iow of the current through the coils c and c the .rapid alternation in the direction circuit simultaneouslyy reverses theofthe magnet, as thecoils c an c are the field b core of magnetic armature olarity included within the armature circuit. The4 synchronization of the reversal of directery throughconductor 27 to the brush terminal 13', and vthrough brush b', v the commutator and the armature coils', to brush b', the return path being by Way of conductor 21, to terminal 13", conductor 20, switch 18, and conductor 28. In this case the coils c and c are not included within the circuit and are not energized and the field excitation is that of the ermanent magnet alone.

A high voltage direct current may also be connected with my improved machine, as

shown in Fig. 4, in such a manner that this' current may also How through the coils c and c. This source of direct current is illustrated at 30. Its circuit ,is shown as controlled by the same switch 23 that controls the circuit of the alternating current generator 22. The circuit-gf the direct current generator 30 is as follows: from the source 30, through switch 23,' lamp 23 to conductor 25, terminal13, coils c and a',

terminal 13", conductor 21, brush terminal 13, brush b the commutator and the-armature coils, brush b, brush terminal 13', and conductors 26 and 31 back to said source.

Fig. 4 is intended merely to illustrate-the various ways inwhich my machine rmay be used with current of different kinds and from 'various sources, the addition of the terminals 13 and 13" permitting the machine shownin Fig. 4 to be used either with or without the coils c and c in circuit and with either battery, direct or alternating current.

It will, of course, be obvious that when the legs of the 'laminated field are wound with coils, for the purpose of magnetizing through suc coils, any suitable' circuit connectlon `of these coils may be made. Here passing :1n-'electric current said coils are illustrated as in with each other and with the armature.

What I claim and desire to secure by Letters Patent is:

`l. A motor comprising in combination, an armature having a commuted winding, a

material of high retentiveness, amagnetizing windin means for connecting. said 'magnetizin winding in series with said armature win ing, and terminals connected with said armature and magnetizing windings whereby an -electromotive force may be: impressed on either winding alone or on. both armature and magnetizing windings in series.

for said core,

`2. A motor comprisingin combinatio'nfnn armature `and magnetzing in se- 4armature havi a commuted winding, a ries, i laminated core o magnetic material of hi h In testimony whefreof I have hereunto set ^retentiveness, a. magnetizing winding or hand inv resence of two subscribing 5 said core, means for connectillg said magwitnesses, this ourtlnday of May, 1915.

netizin win ing in series wit sai arma.- n i ture winding and terminals connected to CHRISDPHER' A' SHEA` said amature and magnetizing windings, Witnees: A n whereby an electromotive force may be im CARROLL L. lnRxINs, `10 pressed on either windingalone o on both K. M. S'oum'sn. 

